MLA

G. W., et al. Colton's Texas. G.W. & C.B. Colton & Co., 0AD. https://collections.library.yale.edu/catalog/15811501.

APA, 6th edition

G. W., Colton, C. B., & C. (0 C.E.). Colton's Texas. [Maps]. G.W. & C.B. Colton & Co., https://collections.library.yale.edu/catalog/15811501.